Kill deer ignoring elk or do nothing? (5)
I believe the answer is:
idler
'do nothing?' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for idler that I've seen before include "One resting" , "one averse to work" , "Bum" , "Lounger" , "papers" .)